| 摘要 |
PROBLEM TO BE SOLVED: To provide subscriber circuit that accommodates (miniaturizes) a plurality of subscribers with a plurality of circuits with a high density and is realized at a low cost. SOLUTION: A low breakdown voltage LSI 11 of this subscriber circuit comprises only multiplex signal processing circuits not including an A/D converter 5 or a D/A converter 6 for each line. Thus, the low breakdown voltage LSI 11 is miniaturized and its cost is reduced. Since a signal delivered between high breakdown voltage LSI 1-1-1-n and the low breakdown voltage LSI 11 is a digital signal, crosstalk among the lines can be reduced. |
